Deal with the Solaris lack of SUN_LEN... use sizeof() instead.

The sizeof acts on THIS:
/*
 * Definitions for UNIX IPC domain.
 */
struct  sockaddr_un {
        sa_family_t     sun_family;             /* AF_UNIX */
        char            sun_path[108];          /* path name (gag) */
};

I second that gag.

src/sbbs3/umonitor/spyon.c

@@ -72,7 +72,11 @@ int spyon(char *sockname)  {
 	
 	spy_name.sun_family=AF_UNIX;
 	SAFECOPY(spy_name.sun_path,sockname);
+#ifdef SUN_LEN
 	spy_len=SUN_LEN(&spy_name);
+#else
+	spy_len=sizeof(struct sockaddr_un);
+#endif
 	if(connect(spy_sock,(struct sockaddr *)&spy_name,spy_len))  {
 		return(SPY_NOCONNECT);
 	}